Washer pump with a respiratory hole communicating a motor accommodating portion and an outside

Abstract

A washer pump configured to suck liquid stored in a tank and configured to jet the liquid to a surface to be cleaned. The washer pump includes: a housing attached to the tank, an impeller rotatably provided in the housing, a motor rotating the impeller, a motor accommodating portion provided in the housing and accommodating the motor, a corner portion provided in the housing and disposed between the motor accommodating portion and the tank, and a respiratory hole provided between the motor accommodating portion and the corner portion. The respiratory hole communicating an inside of the motor accommodating portion with an outside thereof.

The invention claimed is: 
     
       1. A washer pump configured to suck liquid stored in a tank and configured to jet the liquid to a surface to be cleaned, the washer pump comprising:
 a housing attached to the tank; 
 an impeller rotatably provided in the housing; 
 a motor rotating the impeller; 
 a motor accommodating portion provided in the housing and accommodating the motor; 
 a corner portion provided in the housing and disposed between the motor accommodating portion and the tank; and 
 a respiratory hole provided between the motor accommodating portion and the corner portion and communicating an inside of the motor accommodating portion with an outside thereof; 
 wherein one end side of the respiratory hole is opened to the inside of the motor accommodating portion, 
 an other end side of the respiratory hole is opened to an inside of the corner portion, and 
 the inside of the corner portion communicating with an outside, and a part of the inside of the corner portion is covered with a cover member that closes an opening portion formed at the housing on a side of the respiratory hole. 
 
     
     
       2. The washer pump according to  claim 1 ,
 wherein the respiratory hole is provided with a porous filter that is configured to regulate passage of water and to allow passage of air. 
 
     
     
       3. The washer pump according to  claim 2 ,
 wherein the porous filter is provided in the corner portion, and is covered with the cover member that closes the opening portion formed at the housing on the side of the respiratory hole. 
 
     
     
       4. The washer pump according to  claim 3 ,
 wherein the housing is provided with a first ventilation passage that communicates with the other end side of the respiratory hole, and 
 the first ventilation passage is covered with the cover member that closes the housing. 
 
     
     
       5. The washer pump according to  claim 4 ,
 wherein the first ventilation passage extends in a width direction of the housing, the width direction crossing an intake direction of the liquid. 
 
     
     
       6. The washer pump according to  claim 5 ,
 wherein the one end side of the first ventilation passage communicates with the respiratory hole, 
 the other end side of the first ventilation passage communicates with a second ventilation passage that is provided in the housing, and 
 the second ventilation passage extends in the width direction of the housing, and is not covered with the cover member. 
 
     
     
       7. The washer pump according to  claim 4 ,
 wherein the one end side of the first ventilation passage communicates with the respiratory hole, 
 the other end side of the first ventilation passage communicates with a second ventilation passage that is provided in the housing, and 
 the second ventilation passage extends in the width direction of the housing, and is not covered with the cover member. 
 
     
     
       8. The washer pump according to  claim 2 ,
 wherein the housing is provided with a first ventilation passage that communicates with the other end side of the respiratory hole, and 
 the first ventilation passage is covered with the cover member that closes the housing. 
 
     
     
       9. The washer pump according to  claim 8 ,
 wherein the first ventilation passage extends in a width direction of the housing, the width direction crossing an intake direction of the liquid. 
 
     
     
       10. The washer pump according to  claim 9 ,
 wherein the one end side of the first ventilation passage communicates with the respiratory hole, 
 the other end side of the first ventilation passage communicates with a second ventilation passage that is provided in the housing, and 
 the second ventilation passage extends in the width direction of the housing, and is not covered with the cover member. 
 
     
     
       11. The washer pump according to  claim 8 ,
 wherein the one end side of the first ventilation passage communicates with the respiratory hole, 
 the other end side of the first ventilation passage communicates with a second ventilation passage that is provided in the housing, and 
 the second ventilation passage extends in the width direction of the housing, and is not covered with the cover member. 
 
     
     
       12. The washer pump according to  claim 1 ,
 wherein the housing is provided with a first ventilation passage that communicates with the other end side of the respiratory hole, and 
 the first ventilation passage is covered with the cover member that closes the housing. 
 
     
     
       13. The washer pump according to  claim 12 ,
 wherein the first ventilation passage extends in a width direction of the housing, the width direction crossing an intake direction of the liquid. 
 
     
     
       14. The washer pump according to  claim 13 ,
 wherein the one end side of the first ventilation passage communicates with the respiratory hole, 
 the other end side of the first ventilation passage communicates with a second ventilation passage that is provided in the housing, and 
 the second ventilation passage extends in the width direction of the housing, and is not covered with the cover member. 
 
     
     
       15. The washer pump according to  claim 12 ,
 wherein the one end side of the first ventilation passage communicates with the respiratory hole, 
 the other end side of the first ventilation passage communicates with a second ventilation passage that is provided in the housing, and 
 the second ventilation passage extends in the width direction of the housing, and is not covered with the cover member.